Question
Download Solution PDFThe range of super-heterodyne receive tuning when fL0 > fc with broadcast frequency ranges 540 to 1600 KHz
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
A superheterodyne receiver changes the RF frequency to a lower IF frequency. This IF frequency will be amplified and demodulated to get a video signal.
The block diagram of a superheterodyne receiver as shown:
Generally, Mixer will do the down Conversion in Superheterodyne Receiver i.e.
IF = fL – fs
fL = IF + fs ---(1)
fL = Local oscillator tuning
IF = Intermediate frequency = 455 kHz (Standard)
fs = Signal frequency
Calculation:
Given range of input frequencies is from 540 to 1600 KHz.
∴ The range of local oscillator tuning using Equation (1) will be:
fL(min) = 455k + 540 k = 995 kHz
fL(max) = 455k + 1600k = 2055 kHz
fL = 995 -2055 kHz
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